haschisch vs hashish

haschisch and hashish both are nouns.

Word	Noun	Adjective	Verb	Adverb
haschisch	Yes	No	No	No
hashish	Yes	No	No	No

As nouns, haschisch and hashish are synonyms defined as:

haschisch and hashish: purified resinous extract of the hemp plant; used as a hallucinogen

Other synonyms of haschisch include hash, hasheesh.

haschisch (noun)	hashish (noun)
purified resinous extract of the hemp plant; used as a hallucinogen	purified resinous extract of the hemp plant; used as a hallucinogen